How Diana's Tell-All Changed Things
Philip's friendship, however, lasted only so long. The 1992 publication of Andrew Morton's Diana: Her True Story brought about a sea change in her relationship with Philip and the broader family. The book told the world about Diana's eating disorder and suicide attempts and Charles's relationship with Camilla Parker Bowles. Beyond their concern for Diana's welfare, the royals were aware that the book reflected very poorly upon individual relatives as well as the institution. Much of what Philip did in his life was motivated by his desire to protect the queen and the crown, and the book was seen as a betrayal.
Diana denied involvement with the book, despite having been instrumental in its creation. Andrew Morton wrote later in Diana: In Pursuit of Love that publication of the earlier biography prompted the queen and Philip to summon both Diana and Charles to a meeting. There, Philip angrily accused Diana of lying about her involvement; he also said the family possessed a tape recording of her on the phone talking about the book prior to its publication.
She was incredibly upset by the meeting, but things within the family nonetheless carried on as they were for some time longer. There were scheduled events for the queen, Philip, Charles, and Diana to attend, including that year's Royal Ascot races. Philip's changed feelings toward Diana are believed to have been on display when he publicly snubbed her at the races that summer.